Value of used Shimano groupsets?
I'm a noob to cycling and I can't decide whether buying used groupsets is a good idea, especially price vs quality.
I've seen good condition Shimano 600 (90's) and Shimano Tiagra groupsets (F&R Deraillers, Brakes, Shifters, Crank, Cassette, Levers for around 200-250 bucks. Considering that the 600 was the 90's equivalent to Ultegra and that Tiagra sets are more than 400 buck new, are the used components worth 200?