I get why everyone is pissed off. Yes, the ending is so vague, it's annoying. Yes, Jimmy was left so unknown. Yes, the ending in general ended too abrupt and just sucked. But! If you forget about the ending and just focus on the story, characters, everything, then you gotta admit, Priceless was awesome. I laughed in every chapter, like laugh out loud laugh. The characters were awesome. The main wasn't a wimp (she had some great insults in there). Jimmy was hilarious and mysterious (I think the reason he was looking for Lang-bee was because her Mom left Jimmy [or just died?] and he was desperate to get her back so he searched for her daughter and yea... If that's what Young-You was doing, then it was brilliant.) Dan was original in his own way. A loser poet who's rich. Yea, don't see many of those, do you?
The best part about this manhwa is there are no fillers. So it just goes and goes. People are living there lives (in a hilarious way) and eventually things happen, people meet and it works. If you hate abrupt endings (it almost feels like she just had to end it so she left it nice and ambiguous) and a slightly twisted heroine (she has an obsession for money) then you might find this a little annoying. But don't let those things stop you from reading. Honestly it was a tad slow at first, but I wasn't familiar with the characters and once I "knew" who I was reading, it was a fun and great read.
Oh, the art is okay in the beginning. But by the end it's amazing. I love Young-You's art. So unique, fresh and fun. Don't let the ending scare you off.