any thoughts?

I can't see purchasing older and/or well used cd transport. Even if one believed it may provide higher quality sound than today's transports I wouldn't do it. CD transports should be considered as consumable product, defined lifespan. I had a single well loved cd transport many years ago, when it died I was pretty shattered. I tried heroic diy repair, factory approved repair facility would have charged me at least half of what unit sold for new, no way. Anyway, I tried various subsequent cd transports, none approached sound quality of dead unit. The whole thing drove me away from cd transports and into streaming. My take is what if you love sound of used transport, it dies, you can't repair, too big a risk. My take is either stream or purchase low hour repairable used or new transport.

I owned the Cal for many years - nice unit but nothing special. I now have the Audio Lab 6000 - it is a better unit. BTW if the Delta fails you can't get a replacement laser for it.

sns

I can't see purchasing older and/or well used cd transport. Even if one believed it may provide higher quality sound than today's transports I wouldn't do it.

Transports are the most unreliable component in audio. Ancient is not good, unlikely replaceable.

You might consider a streamer instead. CD players are slowly going extinct. Streaming is the future. My streamer sound better than my CD player, and the same as my analog end. For the price of one CD per month you get access to nearly infinite music. Qobuz streaming the highest quality. 
 

I would not do it.