One thing I feel that's missing in the game is Derek's reaction to all the tail the mc is getting.
When the mc is down, Derek is there to cheer him up, "more fish in the sea" and all that (I wonder if the fish prank from the fridge also paralleled that, as well as making the mc stinky...
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), but anyway, he never reacts to when the mc is nailing it.
What I'm getting at, is when a guy hooks up with a hot chick, his friends are all like, "Holy shit, how'd you manage that you ugly bastard!" and shit like that.
It would have been funny if, let's say in the Ep8 library scene, when Jill invites them to her recital and Derek oh so subtly inquires as to who she is, "Thanks so much! But who the hell are you!". When he realised that it's the Jill that the mc was dating, he should have turned to Fuckface and whispered, "Wow!".
And when Jacob testifies that the mc fucked Quinn on the DIK mansion roof, Derek should have responded with something like, "WTF!? You're fucking Quinn?! What about our revenge pact? Bros before hoes dude!"
And then there's the Rooster cluck with Nicole, Derek's response is: "Clothes really change a person". It would have been funnier, once Derek found out it was Envy, if he responded with something like, "Old Boobs? So she's not always cranky? Way to go ass man!"
There are heaps more times when Derek could have commented, on the mc's exploits, like after Bella does the walk of shame, when the mc heads off with Sarah in Gender Studies, and even the whole thing where the mc stays with Sage.
Eventually, after Derek becomes aware that the mc is whoring it up everywhere, he could have been like, "Holy shit ass man, is there any girl here you haven't fucked (please say my sister, please say my sister)?"
Seems likely Vinny would be pissed, and you're right, even after doubling her price Quinn is still cheaper than Vinny. That's why the Pink Rose girls switched. So he couldn't buy from Vinny even if he wanted to. Presumably he's looking for other options. Maybe he's trying to connect with Buddy?
I thought Quinn's price doubling was a one time thing to make up for her being robbed.