I like them. It makes for a struggle to get the item. I'm going to add uses for diplomacy, bluff and intimidation, to reflect the players trying to hustle their way to win the auction.
Arachnaphobe alert! (me) That's odd, I just killed on in my garage but a half hour ago.
I was actually bitten by a brown recluse when I was 7. I was in the hospital for a few days, and had scabs covering most of my leg, and portions of my torso. I ended up with a small hollow spot inmy thigh. Nast little buggers.
They're trying to take over!! Run for it! We must establish a safe base of operations, like say, a brown recluce infested three story house! Then we have to keep the hoards of spiders back while we go up the stairs, and finally end up on the roof with no place to go!