I checked Guadalajara to Ajijic Uber prices a few weeks ago and was quoted $520 pesos (one way). Your driver wants to do it off app because Uber drivers have to give 25% to Uber.
Uber prices fluctuate depending on demand too. I have seen prices from Providencia to the airport (1 way) fluctuate between $170-$450 this year. Uber prices have generally gone up compared to years past. They are convenient though.