I've had pretty marginal luck at drug stores, but Rite Aid does carry a 50 pc. box for $7.99. Interestingly, I couldn't find the specific item on their web site, and their web site claims they have a different brand which I could not find in the store.

They also seem to have a two-for-one sale going on right now. I purchased two boxes, walked out of the store and noticed one box was charged full price, one was marked "**FREE**, Reg 1/7.99".

These are powder free, uni-sized and appear about 4 mil and comparable to others "large" size.

Another comparable is the 6 mil. 50 pc. box I get from Lab Safety Supply (LSS.com) which is $12.30 (qty. 1-9). These are powder free, but sized.

Another nice thing is LSS has a lot of other cool stuff like the N100 masks that I've found semi-difficult to find and another favorite of mine the Nitrile dipped, Kevlar gloves.

-john