I lucked out and was able to snag Waves 1-3 minus the Shattered Glass Prime on eBay (26 figs total). All were pre-assembled but came with all the accessories (extra hands, pog, etc.). The person sold it as a lot for $80 plus shipping. It was quite a steal. Cant wait for wave 4 (even though I know I will be paying full price).
$6.99 for a random single, $69.90 for the full box of everything. They're on the Blokees site, but they can be ordered (with different prices depending on the site) on Alliexpress, BBTS, and a few other sites