I was into retro even back in the 90's - my first car was a 1961 A40.
Cars (not so much now due to time and space)
retro hifi (ok some of it was new when I got it, but so was the bike)
Radios (50's/60's) only got 2 now though.
Mini reel2reel tape deck - definitely one of my favourite objects
3 cast iron singer sewing machines (from my kite making days),hand tools mainly for wood work
RC Tamiya cars
Super 8 camera and 3 projectors
Hornby rail stock
Cameras
pre-1930's maps
retro magazines, cars mainly but I bought a 1970 issue of vogue for my wifes birthday one year, I didn't buy the retro bush mags sat next to them though
I think I am drawn to the look of an object more than anything, and the usual I wanted it as a kid scenario. No idea why I am always skint.