Welcome. You can definitely save on the used market and get a nice system. You just have to know what you’re looking for there too. From what it sounds like, there’s nothing left except the CD player. Basically, you start from the ground up. You have to think about what you want and what you are willing to pay for it. Sometimes the appetite only comes when you eat. Should it be a system made up of many individual components? Or would you prefer an all-in-one solution for aesthetic and space reasons? How big is the room? How big should the speakers be? These should be adapted to the size of the room. The amplifier or power amplifier should then be selected to match the speakers. Which media do you prefer? CD, record or would you prefer streaming? Streaming has many advantages. It is convenient and offers endless possibilities for music selection. I mainly stream and I only have the CD drive as an emergency if the internet goes down. 
Room size, budget and wishes, whether large or small speakers are preferred. And maybe something else is expected. Fine detail, analytical sound would you prefer a little warmer? Should it be possible to hear very loudly or rather quietly? Only you know their preferences. Some people don’t hear too well in the treble range and might want a slightly more high-frequency sound. Or should the bottoms make your trouser legs flutter? Oh yes, maybe where do you live? This could make recommendations easier to see what is available in your market. Greetings Andreas
And that’s what I am looking forward too. Gonna pay off the house, get my forever system and enjoy the music!
I think that description applies to many of us. I’ve loved sports cars almost as long as I’ve loved hi fi. Still drive my MX5 Miata but it isn’t my main source of pleasure anymore. I see people on the highway with their big travel rigs hauling their big boats or dune buggies and it makes me think how much these people have invested in their hobbies, let alone their fuel and insurance costs. I’ve invested a lot in my system since I’ve retired but it doesn’t hold a candle to what all those people have.
I had a friend who liked foreign sports cars and he bought his own helicopter. I have spent way more on my hobby than he spent on his. But then he built a super insulated home with 24 inch thick walls. I haven’t spent that kind of money. But close. Too much for sure though.
Welcome to the FORUM!
Knowing your budget and commitment to CD will result in better focused and hopefully helpful suggestions. How large is you CD collection, how committed are you to it. What are your system long term goals in terms of upgrades.
IME CD transports are a bit of a dying breed. As such any manufacturers have discontinued them. Paul did hint at a new CD transport to be released late spring/early summer. Note, PSA has a habit of missing launch dates by a significant amount. May be worth the wait.
Depending on your budget a lightly used PSA DSD DAC Mk I can be had for well under $2k. Or if your budget allows, there is the DSD Mk 2.
If your long term plan is a complete system upgrade, then select a digital front end you can live with for the long term. The Grimm MU2 gets the job done without needing a CD transport and can be fitted with an 8Tb SSD.
Before I jumped on the PST bandwagon a few years ago, I had a NuForce CDT 8 CD transport that I thought was very nice without being a budget buster. And it had an HDMI port that was pin-compatible with PS Audio’s I2S protocol. It had its quirks, though. Minimal controls on its faceplate - you really needed to use the remote, which wasn’t even close to being ergonomic (it was like small brick) and even then there was no direct numeric track access. If you weren’t interested in the whole album, you’d have to skip each preceding track individually. But it sounded good enough that I was happy with it as a replacement for a Rega Planet player.