Reporting back, I ended up taking it when the fee went up AND they said to ask for more if needed (well duh). I did and they assigned it.
The job wasn't awful but it was a lot of pieces (I merch for Kalan so used to putting up hundreds of items at a visit) and it wasn't totally clear if the entire fixture was supposed to be reset (I didn't but did remove the seasonal put the new designs up and rearranged the rest of the fixture).
Took longer than I anticipated but at the higher negotiated rate still came out to over $20 an hour - not inlcuding mileage (didn't have any other work in the area and didn't have the other TA shop to do) so that was a deduction.
It came up again - URGENT but they didn't accept my offer (bumped it up) and it dropped off, now back to base pay.
No way.