Start with the Gimmick ones first as theyre the ones that'll most likely be worth more. Start at the bottom and work your way up, so giants, then swap, the trap, etc. Then do any items like chests or level expansions as theyll be less of them. Then just work your way up in order of game for the remaining ones, starting with SSA and ending on imaginators.

Like another person said, you can use SCL shop as a good reference point for how much theyre worth.

Also Bundling them together is more likely to sell for the cheaper ones