A Low Cost Pleasant Sounding Used CD Player?

What DAC are you using?

Might be better to go with a CD player VS a transport depending on what it is.

Also, what is the budget?

DeKay

I'd second the Audiolab 6000cdt. Great transport for little money on used or new market.

Luxman D-N150 

you should be able to snag one for under $1500 used. 
I’ve owned my which I bought used for about 3 years now 

Also it rivals a Luxman PD -150 table with Lyra Kleos SL 

analog front end. All made in Japan so should be pretty reliable 

You know, saying low cost really doesn’t mean anything. You should state your specific budget.  That said, given what you’re looking for I’d look right to Marantz.  Personally I wouldn’t wanna buy a used CD player because you have no idea how many hours the laser/transport have on them.  I’d buy from here…

https://www.accessories4less.com/make-a-store/category/cdplayer/home-audio/audio-components/cd-sacd-players/1.html

Best of luck. 

@tsampa 

Are you suggesting something like a SONY UBP-X800 universal player

I was thinking of the even cheaper X700 universal transport!  Not something you would want to show off to your mates, but it does a remarkably good job of getting the bits off the disk and down the HDMI cables.  The remote is extremely basic, for example you cannot use it to directly select a track by its number, and its build quality is cheap!