Bear Lek makes some good points John - it does all depend on the monthly costs though.
The used car market is a real lottery in Thailand - it is most places, but there is often some legal protection which you will not find here.
The other thing that you have to consider is that (without difficulty) you will need to pay cash, rather than finance.
It is far easier to get finance on a new vehicle, but there are still sometimes 'difficulties'.
I have not seen a Prius in Udon, the standard Toyota car models available in Udon are:
Yaris, Altis, Vios, Camery
Here is a site to give you an idea of new prices. As Bear Lek says second hand cars hold their value exceeding well so the discount on buying 'nearly new' is very small.
http://www.toyota.co.th/en/product_index.htm








