are the carded figures still sealed?
because all the boxes seem to be open (the hordak/grizzlor set is also missing the cassette between the figures).
hard to guess prices for opened boxes ... especially the 3 pack is harder to find and tends to end for good $$$ on ebay in sealed condition, but i have no idea about a price for a box in open condition.
the carded figures are mostly just standard characters. between 25 to 50 bucks for each. the "rarer" (= generelly more expensive) ones in the lot are: sorceress (100+ usd) and stratos (70+ usd).
best place to sell?
most likely ebay, in order to get adequate prices.