I may finally be getting around to buying frames for the small collection of original and reproduction one sheets I have, and am looking for advice on what I should and shouldn't be looking at. I don't have a huge budget for this, so getting too crazy isn't going to work, but I would like some simple frames that won't damage the posters I have. None of these are really that expensive ($7-30 off ebay), but I don't want to have them fade or be damaged unnecessarily. I will probably want to be able to change the posters out on occasion, so nothing permanent. I am also into a minimalist approach when it comes to the frame - small black or even frameless would be options. I know I need an acid free backing material, but some have suggested foam core, so is that a viable option. I am also wondering about going with UV glass. These won't be in any direct sunlight, so I don't know if that's a factor or not. Thanks in advance!