Used "BBS02" buying advice

[COAR]

Found a listing for a bike with what's presumably a BB02 ("750 watt bafang mid drive") and a "17.5 ah hail long" battery. Bike itself seems OK, no brand listed but it's at least better than a walmart bike. The guy is asking $950 but it's been listed for 2 months so hopefully I can talk him down to the 700s.

I built up a BBS02 previously with a bike I already had (purchase cost $700) so with the battery + motor, all in cost was pushing $1800. Getting a working ebike for half that seems like a steal. This 'new' ebike would be a b-day present for my father.

Anyways, any consumer advice for a used battery and motor?

 

[calab]

$950 seems way to much to me, but I could be wrong for an unknown bicycle brand and questionable component status.
If its used, the battery is worth ZERO so plug that into your calculations.
Bikes probably worth $100-200 max if new. If used, no name is worth ZERO.
The motor you better open up and take a look at, see if it aint cooked or damaged gears, or if it even has grease inside.

Wouldnt it just be better to buy a BBSHD from a reputable source and install on a cheap Trek steel frame or something?
$675 plus shipping https://bafangusadirect.com/products/bafang-1000w-bbshd-mid-drive-ebike-motor-kit
Complete kit for $1k - https://bafangusadirect.com/products/complete-bafang-1000w-bbshd-mid-drive-ebike-motor-kit-battery
Comes with a free 48V 11.6Ah Ultra Slim Shark Ebike Battery (2900 18650 Cells)
Other options on the battery.

If you are in a big city then used bicycles online go for $50-100, and its a good brand that is 20yrs old but still in tip top shape, not an unknown brand. Its better to go with a 20 year old Trek then some piss gamble on unknown entities.

 

[Braddudya]

I'm sure it depends on the region you live in but around me used ebikes don't sell for much. Everyone lists them for $1000ish but no one buys them. I bought a BBS02 on a decent Kona mountain bike for $400 even though it was listed for $900. Just throw a super low ball offer out. They might have almost given up on selling and and will just be happy to be rid of it.

 

[COAR]

Ending up buying it for $375. Said 3k miles on the display. That might be on the high side but I still consider this a reasonable deal -I paid almost 3x that price for my BBS02 kit.

It's a Mongoose, seems to be walmart in origin based on the s/n. The frame itself doesn't seem terrible but the rest of the parts are pretty low rough. Planning to buy a mid range 27.5+ hardtail (e.g. Roscoe 8) and swap the parts. I've already stripped the motor and everything other accessory.