I acquired a dilapidated acoustic bass that was about to be thrown out. There were no strings on it, no bridge pins and all the machine heads merely turned loosely without turning the actual tuning poles.
Not risking investing much on an instrument that may not work I bought the cheapest tuners, strings and bridge pins available on Thomann.
Luckily, the instrument did work splendidly after some work and the bridge pins, despite initially appearing to be in flimsy plastic, actually did the job they were designed for perfectly. It's been a couple of months now since I revived the instrument and I can't complain about any of the three items I purchased to revive it.