My absolute worst experience was a very very clean Lenco L75 that showed up buy it now at around midnight for $75. What followed was a detailed set of instructions from me for packaging, an offer to pay above his shipping quote to cover it, and a demand that it be insured totally. This was met after several back and forths that it would take too much time and effort, and the UPS place would package fine, etc. I paid extra, it was packed "well" and shipped fully insured. What arrived was so completely destroyed that I practically screamed. Short end was I got my full refund, the poor machine was sent back, and who knows what happened to it after that. I gave up on my search for a clean old Lenco.
I have purchased several that made it fine too. One just took a bad whack from the shipper, but it was packed well, so no complaint there.
I have sent several turntables off after selling on ebay. I can say I have 100% success. I know how, and take the time. My secret to success is sheet of styrofoam insulation from Home Depot. The stiffer the packing - same as most manufacturers - and zero movement, and you are fine.
I have one that came today actually (bought for parts, so less hope or worry) and I will let you know!