[Advice] Should i buy this? 2015 Prius, 150k miles

I found this prius that supposedly just had its hybrid battery changed. Its a 2015 base prius, with 150k miles. Selling for 7.5k looks decent cosmetically on the outside. it belonged to a family with several kids. they said they just switched the battery and bought a new car, but then why sell the battery, and why not trade it in? so many questions.. makes me wonder if they changed the battery, but it didnt solve the problem and now they just wanna get rid of it.. anyway its my first used car, and im just trying to get as much info as i can before i physically go take a look. I will get a pre-purchase inspection, but anything i can look for or ask BEFORE i pay 200 for that?



Assuming they really just wanted a new car and everything else is fine, Is it a good deal? how many miles do you think it will last? and what maintenance should i be prepared for down the line if nothing catastrophic happens? of course i know i cant count on anything but just asking about maintenance, routine services at 160k? 180k? 200k?



thank you for any advice.



edit: also, ive heard prius batteries last for like 200k miles or more... especially the newer generations. why did this one not last as long? is it a red flag? thanks.

 

this is in California, does that mean it was probably just replaced through warranty? If it was, and they have the paperwork to show it, should i be worried about anything else? is it likely they just wanted a new car to drive around and are selling the old one?

 

Im definitely going to get a pre-purchase inspection for the vehicle, even if this isnt the exact car i choose. Are the things you mentioned all routine for the inspection? will the mechanic be able to check and see if the head gasket, intake manifold and etc are all in good/decent condition, or is it something thats a gamble even after inspection? I have a very trustworthy mechanic, but How reliable is an inspection? Is it still a gamble after inspection? Will the car be able to last.. for.. lets say 50k miles (from 150k to 200k)? Of course, once its in my possession, ill be doing routine maintenance.

 

thanks so much for your advice.

I know this one is probably going to be another one to avoid.. but its in my budget and what i need. Id like your opinion please.

im 2008 prius with 134k miles. Salvage title. But its only $3,700.

He "said" runs fine, hes only had it for 2 years and hasnt done any major maintenance. and after searching it, there are 2 collision reports. Also, the license plates for California are super new for a 2008 car.. starts with an 8.
Date of loss
2018-02-14
Cause of loss
Collision
Date of loss
2017-11-13
Cause of loss
Collision

please and thank you for your thoughts!