Right now my favorite is the INGO classifieds, found some for sale couple weeks ago on here, had my buddy contact the seller since i'm not to the post limit yet- almost there and sure enough by that evening we had 500 rounds of 9mm at a fair price... turns out the seller even lived in the same neighborhood as my friend...
I was very happy with Midway until I found Profire Arms on Indy's west side. I always prefer supporting local businesses when I can. These guys are great and will keep my business.