Ebay source for 987 OEM wheels/tire sets
 

Anyone looking for an extra set of wheels for their 987 would do well to check this guy's auctions; he seems to have a knack of having the lowest prices on takeoffs. I bought a set from him in December and the goods were as advertised.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1,1&item=8072546982&sspa gename=STRK%3AMEWA%3AIT

He also had a set of Cayman 18" that went for $1425+ shipping with PS2's on them; the tires were worth at least $1000

Of course, YMMV..