Which model powered speakers?

Bluetooth Receiver $28.

Or WiFi Streaming with voice or app control + Bluetooth:

• Echo Dot $39, plus audio cable sold separately.
• Wiim Mini or Pro $85 or $149 both with Airplay 2 and Siri, Pro adds Chromecast Audio and Google Assistant.

Are you trying to plug digital sources into this thing or do you just want it to receive a BT signal. For the former, something like this would work; and for the latter you would need something more like this or this

https://www.amazon.com/dp/B078J3GTRK/ref=cm_sw_r_cp_awdb_t1_eZSQEbR67S7JZ Bluetooth audio adapters seems to be the phrasing used to find them. Note that there are options that go inside the stereo this one does not.

https://www.amazon.com/B06-Plus-Bluetooth-Receiver-Streaming/dp/B078J3GTRK love this, check my post about it a few comments below :)

I had that same issue and after 3 dongles found this one: https://www.amazon.com/B06-Plus-Bluetooth-Receiver-Streaming/dp/B078J3GTRK it sits nicely inside my armrest totally invisible and as soon as I turn on the car, my phone pairs flawlessly. It really really feels like a factory solution, besides my car emits a nice beep when I start it up courtesy of the Bluetooth pairing, best gadget I could ever get for my car.

Good price. New or used cartridge doesn't matter much since they don't wear out. It's the stylus you want to be new since that is what wears out and gets replaced. If it's a new cartridge then it should usually have a new stylus on it.

Optionally connect a Bluetooth receiver to the speakers for digital music. Or Wiim Mini or Pro both add Wifi streaming with Alexa and Apple Airplay 2 with Siri in addition to Bluetooth, the Pro adds Google Chromecast and Assistant.

A later upgrade would be to an amp or receiver and a better and usually larger pair of $200+ passive speakers or buy used for half the cost.

Audio Guides, Speaker Placement, Accessories and Vinyl Care

Thank you very much, minimal :)

I just looked on Amazon quickly and found what seems to be what you are suggesting, more or less: (?)

BT Receiver to hook up to my A/V receiver AUX input:
https://www.amazon.com/B06-Plus-Bluetooth-Receiver-Streaming/dp/B078J3GTRK/ref=sr_1_5?dchild=1&keywords=1Mii&qid=1627943241&sr=8-5

And

Transmitter to hook up to my mixer's main outputs:
https://www.amazon.com/Upgraded-Bluetooth-Transmitter-Wireless-Headphone/dp/B0838YPSZT/ref=sr_1_8?dchild=1&keywords=1Mii&qid=1627943668&sr=8-8
~$80 or so for both together sounds about right?