I suggest that you stay away from any composite to VGA adapters as except for some games I don't think the clarity will ever be acceptable. Either wait a few days for a Commodore 1080, 1084, 1960 to show up on eBay (they do quite often), find an old NEC 2A or 3D 14" monitors, Toshiba TIMM 20" TV/Monitor,which will sync down to 15kHz and also do 31kHz, or if you are serious about keeping and using your A500 for a while, spend the money on an external scan doubler/flicker fixer so you can use any PC monitor or flat panel of your choice. I have seen 1080's and 1084's go for as low as $10 on eBay over the last couple of years, but shipping is a bit more due to weight.