Hehe I don't think you're the only one 1orion2many, happens to most of us here!

I sometimes look at the a TF and wonder, "Hey that looks new, have I got that yet?" But usually what helps me is that I take photo of every acquisition the moment I get home and post on my TF acquis album on photobucket. And so whenever I have doubts, I'll just check the album and have a look.

But somehow I do have a slightest memory of it if I have already gotten it. Those that I forget are usually the overseas purchases. With lay-by's you kinda can't help it. That item might already be on lay-by but if you see it cheaper elsewhere, just get it first, complete the lay-by and refund the more expensive one I guess.