I like to own after I try it out. Though when discussing old systems, I'd say I go with the purchase.
I recently dug through my crawl space under the stairs and pulled out my NES, SNES, Sega Master System II, Sega Genesis, Lynx, Game Gear, N64 (They were all in one box), and my Wii was returned from a friend. I'd like to find time to play with all my old systems.
Of course my original giant grey GameBoy from the 80s is next to my bed. Gotta love Super Mario Land and Fall of the Foot Clan… just not the same on an emulator. Purchase all the way!