Too funny though I went to Target to convert my gc's to eBay in store and ran into a bunch of problems. First, I could only find $25's. A worker scanned the $200's for me and said there should be some in the back. I go there, out as well. I find another, helpful guy who goes in the back but all he could find were $50's. They were about to close and he asked how I was going to pay. I said gc and he said I'd have to go up front because electronic processing on his register was most likely shut down. I get up front, and they said there was a limit of 3 I could buy. Then, of course, "you can't buy a gc with a gc." She actually asked and the manager said "oh no you can't do that, that's like buying credit with credit." With a completely dumb-founded (albeit sarcastic) look and tone of voice I say "so I can't use my credit card either?" Her: "Oh no you can use a credit card, but you've never been able to buy a gc with a gc."
I just chuckled, walked out, came home, ordered them online, paid with gc's, and they were already delivered. Long story short, definitely YMMV in store.