I have ten stainless solenoid valves for sale. I'm pretty positive they're the same as these as this is where I bought them: http://www.ebay.com/itm/290601557472
4 - Have never been used
6 - Various state of used condition- some only used for water, others for wort
Of the used ones, a couple have small rust spots on the black solenoid cover; others look no different than the new. If I were to use them again, I'd probably remove the covers (just one nut), prime and paint them a more interesting color.
Also on the used ones, I added some water tight power connectors and a ground wire. I can provide the mating cable that I used or you can just clip the connector and put on your own.
Note to potential buyers:
If you're looking for this to be your first jump into automation, you should know that solenoid valves are not the most ideal for wort; you probably want motorized ball valves. One thing solenoid valves are good for is shutting off quickly so for water supply lines and such they work well. Solenoid valves are also directional so you'll see a little arrow on the valve body, this is the direction the liquid should flow. (These are tidbits I learned as part of the expense of being an early adopter)
I'll be disassembling the used ones just to make sure they're still clean and such. If I run across something unexpected, the quantity of 10 could drop.
Anyhow, let's say $25 each for the new ones and $20 for the used.
Shipping costs are going to depend on where you're at and what size USPS box I can get them in. A single valve weighs about 22oz so flat rate boxes are probably best.
If you buy in quantity, I'm sure we can work a deal over PM.