This thread aims to provide a centralized marketplace for buyers and sellers of limited edition Casascius coins. Postings with buy or sell offers will remain persistently. To keep the thread lean and transaction-focused, I'll try to clean up conversational posts from time to time.  My intent is to keep this intro up to date for a quick overview of historical price trends, along with a listing of current buyers and sellers.  Look to the posts below to find the offer(s) that give you what you're looking for. The start of the thread will have historically important conversational posts. The end of the thread will contain current market offerings, while also allowing for collectible- or transaction-based conversation.

Here's how I think the breakout and classification works.  If I've gotten anything wrong, please let me know.

Casascius Bitcoin Analyzer separates items by Version 1 and Version 2. Version 1 displayes Series 1 coins, with Version 2 displaying the remainder.

Series 1 stickers are those having the CASACIUS misspelling repeating in the background of the holograph.
Series 2 stickers and beyond do not have the holo error.  These coins are identifiable by address notation.
A small number have windowed labels, the remainder are identifiable by address notation.
Series 3 stickers represent 2013 releases, also identifiable by address notation.

Listing Notation

() items are optional
[] items are required

(Year) [Denomination] [Alloy] (Format) [Series] [Grade]


Year: Optional, coins are not categorized by year, rather by series. Never hurts to include.
Denominations: 0.1, 0.5, 1, 5, 10, 25, 100, 500, 1000. Inclusion of 'BTC' is optional.
Alloy: Brass, Gold, and Silver.
Format: Coin or bar. Coin is assumed, with bars only made for 100, 500, and 1000.
Series: S1, S2, and S3 - Sticker Series 1, 2, or 3.
Grade: NG for not graded, or an ANACS MS-xx grading, such as MS-63. NG is optional for Bar Format.

Put that all together, then add a buy price, a sell price, or both.
Your listing can link to your thread offering its sale.

[Listing] (Buy Price) (Sell Price)

Mintage and Historical Sales Data

Denomination	Total Mintage	# Still Active	Highest Known Sale	BTC Premium	BTC Multiplier
1 Brass S1 NG	3615	3615	5	4.0	5.0
1 Brass S1 MS-64	-	-	8	7.0	8.0
1 Brass S1 MS-65	-	-	8	7.0	8.0
1 Brass S1 MS-66	-	-	15	14.0	15.0
1 Brass S1 MS-67	-	-	50	49.0	50.0
1 Brass S2 MS-63	-	-	2.33	1.33	2.33
1 Brass S2 MS-64	-	-	2.33	1.33	2.33
1 Brass S2 MS-65	-	-	2.33	1.33	2.33
0.5 Silver S3 w/ S2 Holo MS-64	45	45	13.5	13.0	27.0
1 Silver S3 solid MS-67	1300	?	3.0	2.0	3.0
1 Silver S3 Gold "B" MS-67	700	?	3.5	2.5	3.5
5 Brass S1 NG	677	608	7.5 (private)	2.4	1.48
5 Brass S2 MS-65	574	455	(private)	?	?
10 Silver S2 NG	447	407	25	15.0	2.50
25 Brass S1 NG	345	201	40.83	15.83	1.63
25 Brass S2 NG	486	364	(private)	-	-
100 Brass Bar S1	57	17	340 (private)	240	3.4
100 Brass Bar S2	86	57	None known
500 Brass Bar S1	2	1	None known
500 Brass Bar S1 - Opened	2	1	None yet
1000 Brass Bar S1	16	2	None known
1000 Brass Bar S1 - Opened	16	13	None yet
1000 Gold Coin S1	5	3	1250 *a	250	1.25

Details

1. Please make your offerings using the same table format shown in the Posting Buy and Sell Prices section.
2. Prices assume coins that were immediately transferred to safe storage upon receipt. If your coins are in a different condition from that, please note that in your posting.
3. Please state whether your listed prices are firm or negotiable. If unstated, the assumption will be that prices are firm.
4. Once you've gotten your order filled or are no longer interested, kindly remove your posting(s) to keep thing tidy. If you're willing to add data to the marketplace,
get back to me with the sale price, and whether to record it as a private transaction, or to include the identity of the seller. Having a verifiable seller adds trust to the reported number, and might help generate interest in your holding, too.


Current Buyers

Chainsaw - primarily holo errors (S1), but open to all
coco23 - 1 BTC w/ error
ffssixtynine - 1, 5, 25 BTC w/ errors
arvicco - All 1+ BTC coins, with and without errors
steelboy - All 1+ BTC coins, with and without errors
hawkix - 10 BTC w/ gold B
molecular - no current offerings

Current Sellers

Chainsaw - Brass S1 MS-65/66 in denominations of 1, 5, 25, and 100.
Chaang Noi (Goat) - all collectibles available
runderwo - 1 BTC holo errors (multiple gradings), 25 BTC S1 MS-62
coretechs - 5x 1 BTC holo error
SgtSpike - no current offerings
nightowlace - 0.5, 1 BTC w/ errors, 1 BTC without errors
Chainsaw - graded holo errors
Johnniewalker – multiple, rotating inventory

Log of Holo Error Collectible Coin Transactions

Where links exist, the transaction was done publicly, with a known buyer and seller. In other cases, transactions were conducted privately, or the buyer or seller has requested anonymity.

Denomination	Sale Price (BTC)	Seller
5 Brass S2 MS-65	private	justbtcme
2011 S2 Brass MS-63, MS-64, MS-65, 2011 S1 MS-63 - lot purchase	10.0	justbtcme
1 Silver S3 MS-67	3.0	SgtSpike
1 Silver S3 Gold "B" MS-67	3.5	SgtSpike
0.5 silver S3 w/ S2 holo MS-64	13.5	nubbins
0.5 silver S3 w/ S2 holo NG	6	nubbins (confirmed by SaltySpitoon, escrow)
0.5 silver S3 w/ S2 holo NG	5.5	nubbins
1 Brass S1 NG	3	twmz
1 Brass S1 NG	4.5	austin
1 Brass S1 NG	4.5	DM90
1 Brass S1 MS-64	8	SgtSpike
1 Brass S1 MS-65	8	Nightowlace
1 Brass S1 MS-66	15	SgtSpike
1 Brass S1 MS-67 (first-day)	50	SgtSpike
5 Brass S1 NG	7.4	private
5 Brass S1 NG	7.5	twmz
10 Brass S2? Gold-painted B NG	25	StarenseN
100 Brass Bar S1	340	Chainsaw
1000 Gold Coin S1	1250 *1	Goat

Special Notes (as indicated by an asterisk and number, above)

a) The 1000 BTC coin was exchanged when Bitcoin held a spot value of ~ $800, and sold for $1,000,000. The buyer paid in a mix of fiat, BTC, and gold. For normalization purposes, I converted this to the BTC value.

PM me or post details of other graded holo errors if you care to, and I will gladly add them.