YBA cd1

In a word (IMO) .... "no"

- is it a very good cdp.... yes
-is the cats ass in terms of pinnacle audio performance? No... there are numerous used offerings from NAIM, REGA, LINN and others that surge ahead. 
- is it worth spending $3k.on this 15 year old kit: no

For example the REGA ISIS is up for sale at $4K

-it is far better unit IMO in terms of sonic performance , but that is a value judgement that I will set aside for the moment .

- old cdps will need substantial repairs eventually. Each REGA has two matched serial number transports reserved for it. It is built like a battleship and not forgetting the archived 2 transports for each unit stored by Rega , this hopefully means a very long life unit.

-the ISIS also has a direct USB input into its high-end DAC so you can play all your digital files stored on a hard drive / NAS drive directly from the remote in addition to the cds. 

There is a lot of them up for sale , 

https://www.hifishark.com/search?q=Yba+cd1

But they don't appear to be selling ..... so you are not married to just this one.

Your takeaway

It is old .... full stop. The VERY advanced age of the kit and the looming repair risk  already mentioned  is a BIG knockdown in asking price for the majority of us. 

It is a good unit .. okay.... but it is no ultimate winner. Not even close. Any of the top NAIM, REGA, LINN, ESOTORIC, MARK LEVINSON, DCS , DENSEN, AYRE, SIMAUDIO, ELECTROCAMPIONET  and a large bevy of other newer model contenders will match and best it.

They are no longer a popular choice anymore (lots for sale and not moving ....) so if you don't like it ( and there is a LARGE risk that you may not in your system, as in any blind purchase) you will be saddled with it and suffer a significant impediment in trying to unload for all the reasons herein.

Caveat emptor.

(1) Either move on now, or, 
 (2) Present your final offer, and if it is refused, fine ..... walk away..... again full stop, and stop agonizing over a risky venture.