How long is your longest ride likely to be?
How happy are you are you to charge devices regularly?
FWIW I’m still hanging onto my Edge 25 it’s over a decade old but the battery will still do a solid 4 hours plus.
They’re about as basic as it gets but do have Ant+ (for when you inevitably buy a HR strap) and will connect via Bluetooth for easy upload through your phone, where an old edge 200 requires cable faff and a PC. Failing that a used edge 130 is probably a newer equivalent device that could be scored 2nd hand
if it’s just for mileage loging and you’re not going to be staring at data during a ride then a garmin watch (forerunner XX, Vivoactive 3 or 4 or similar) has the major benefit that it’s harder to forget a thing already strapped to your wrist…
I’d get on that there eBay and just browse the devices going on there in your price range, then check DC rainmaker reviews to see the good and bad points of anything you might bid on.
You will inevitably end up buying a posher device eventually as whatever you get ages and battery life reduces.
@n0b0dy0ftheg0at I paid £75 for a Super-pro last year and I’m still pretty impressed with it for the money, like you I keep looking out for a Mega XL as I fancy trying the silly big battery life and screen…