Need help with dart purchase

Hi everyone,

I'm a first time buyer and wanted to get into something sporty to drive around this summer with my wife. I saw this posting here - Shannon Motors and was wondering if this was a good price for a dart sport? I looked the VIN up and it was originally an L6 225-1v and had the 340 installed at a later time. It's priced at $21.2k CAD. After looking up some similarly priced cars it does seem a bit off, or am I wrong? What sort of price would seem reasonable to offer? I live in Canada.

Forgive my lack of knowledge and thank you!
I think it's priced AT LEAST twice what I think it's worth.