PAPER!
Topps paper usually consisted of Gold, Black, Pink & Camos every year. There were some random colors peppered in through-out the years, most SP’d to under 100. Condition sensitive paper w less than 100 copies seemed like a no-brainer to start procuring earlier, rather than later.
Here’s a quick cheat-sheet of some of those SP topps color over the years
2007 copper /2007 (usually gold, except this year?)
2009 pink crucial catch /??? (fairly rare, only 5 graded to date)
2010 blue border /349
2011 red border /77
2012 orange complete set /86
2015 red foil /60
2015 tru purple /SSSP (toys r us exclusive, pretty rare)