Analogman Maxon OD-9 (Tube Screamer) in mint, virtually untouched condition.  You probably know about this famed pedal and mod, but if not, this is what Analogman says:

"Our SILVER MOD pedals will have the RE-J sticker on the top and the silver sunface sticker on the front as seen on the left. They will also have a date and the type of mod and modders signature on the inside of the bottom plate.

The Classic TS-808 sound is well known and loved by thousands of players and millions of music fans. It cuts through the mix in live situations very well and sounds full and warm, with a vocal frequency spectrum. However some guitar players feel it is a bit too heavy in the midrange and loses a bit too much bottom end, especially people who play fairly clean or alone or in a small combo. The TS-808 EFFECTS your sound, but in a good way. The SILVER option allows it to add the drive and warmth without EFFECTING your sound quite as much- it is more transparent, it does not sound like you are using an effect pedal as much.

In 2002 we came up with a new TS9/808/silver option to meet the requirements of those few super discriminating players. This modification is done in addition to our normal TS-808/Brown mod. It uses many expensive components to make the TS-808 circuit really come alive."

I bought the pedal new from Analogman and used it a few times but my musical style changed, so it's been in storage for years.  Time for it to go to a player who will use and love it.  If you want the BEST Tube Screamer there is, it's this.