Don Foreman wrote:
Pick yer pony, take yer ride. A good valve doesn't cost $5.

Especially on eBay. IIRC, I got a lot of 5 for around %15. Here's a
lot of 10 (current bid $12.99):
http://cgi.ebay.com/ws/eBayISAPI.dll...7192 114&rd=1