It seems to me that off-season can affect sales prices, but also if players from certain items are "hot" or not. Also perceived scarcity, and I know most are serial numbered these days, seems to factor in it........even some cards that are low serial numbered, dont always fetch top dollar. Getting your return value back these days on boxes, unless you get that rare BIG HIT, is likely uncommon. Thats why I'm not in it for the bottom line........JUST HAVING FUN !!
ps.........if anyone who may read this & has a lead on the SP artist proofs (high numbers) from the 2005 Topps Gallery BB.....please let me know.........THANKS !!