I personally am not averse to 2nd hand, but in this situation I can't skimp out. We both know a 2nd hand Apple Watch would be a better fit for the receiver's iphone. But the scratches, marks or tatty box would send the wrong message. I deleted my FB, so unless you know another way, I can't see the marketplace. In the end, I settled for an Aswee for £24 after sales.Tbh. as in most things in life. you kinda get what you pay for. I bought a cheap £60 smartwatch off the forest. and tbh as expected it wasn't great.
The best you could hope for is a smart band type one and the decent ones are over what you want to pay.
Might i suggest the second-hand market or perhaps Facebook marketplace etc. you might be able to get semi decent one for a lot less money?. Also what phone is it connecting to might be a factor.