Right now, I'm waiting for 5 more Warframes to finish building, making my collection a total of 14 Warframes! That seems a lot, but not really because there are a total of 38 regular frames and 23 primed frames. (See: Warframes)
I'm waiting for 4 regular warframes and 1 primed warframe (a Hydroid). Primed warframes are either farmed or traded with platinum, for the Hydroid Prime that I built, I farmed the blueprint for the frame but I bought the blueprint for the components (Neuroptics, Systems, Chassis).
Thanks!