I would discourage you from shopping for a used cartridge. Unlike most components, they do wear out. I have used several of the Benz cartridges, first a silver and now a L.O. .4 and like them very much. They have them at all price ranges. You might try the Record Doctor. I have purchased both turntables and cartridges from them and have been pleased with the price and service.
Help completing vinyl front end.
I have decided to take the plunge into vinyl. My current system consists of Sonic Frontiers T3/P3 digita;l, BAT VK50SE preamp; BAT VK500 Amp, Dynaudio Confidence 5 speakers. I recently inherited a VPI JMW10 tonearm and have just purchased an Aesthetix IO phono preamp. I'm leaning hevily toward a VPI TNT III turntabel and have no idea which cartridge. Any recommendations on cartridges or turntables that will blow away my digital would be appreciated. I'm looking to stay under $4k used for the remainder.