If you buy a fully rebuilt deck, calibrated and specs documented from an expert tech, you should be plug and play, just need tapes. But vintage prerecorded tapes often have the shedding problem due to age deterioration.
Buying used decks from amatuers or resellers is a low probability of satisfaction in sound quality and reliability. I cannot recommend that route unless you are a tech and will be restoring the deck, or you just want to mess around with one for curiousity and won't be disappointed if they sound not so great.
My best experience buying used was a Pioneer 909. But that was decades ago. Just recently before I sold it I made a test dub from hi res TIDAL source and when monitoring during recording between source and recorded signal I could not hear a difference.
None of my three currently owned consumer level vinate Sony's are anywhere near that good sounding.