on the cheap

The question asked includes a few red flags.  “WiFi Streamer” that doesn’t hook up to the internet?  Well Bluetooth doesn’t need internet, but where’s the stream coming from?  Does this person have a stereo amplifier and speakers already?  Obviously the many responses of Node or WiiM are all perfectly good if so.  But if not, an amplified streaming DAC like WiiM Amp would be simpler.  Nodes can play from USB storage, which WiiM does not, so if internet-free use is really desired, a used Node 2i is the best bet.

Kinda blow away, actually, with how much they can cram into this little boxes for the money. I go back to the day when the price of admission an "entry level" CD player was $700, our best-selling VCR was $679, and 42" plasma televisions were $14,000.

The wiim products are excellent 

WiiM Pro Plus. I have set up two low-cost systems for my college-student nieces (vintage Technics receiver + Wiim Pro + refurbed KLH 20 speakers and a KLH model 20 player/receiver/amp refurbed with a WiiM Pro.) They tested out well and reports are good.