2011 Prius AC question

We just picked up a 2011 Prius with 200,000 miles (40K put on the last year)
AC seems to be working fine now, but we have concerns after reviewing the repair history on Toyotaowner.com

One year ago, the seller said he'd had trouble with the AC while on vacation in Boulder CO, so he brought it in to a Toyota dealer there. The tech notes said 'performed evac and recharged. Found no leaks'.

Three months later, the seller brought it in to his regular Toyota dealer, complaining the AC seemed to be working fine on one side, but no air blowing from the other side. Tech notes said they 'tried to vac system but found it empty. Charged system, added dye, unable to find leak. Compressor is making grinding/whining sound.'

Now, 8 months later, (a week before we purchased the car) the seller brought it to a Toyota dealer complaining that the AC wasn't running cold. The tech notes say 'AC dye test, no leaks' but there was a charge for Freon, so they must have recharged?

What's been your experience- are we looking at a compressor problem?
Any advice appreciated.

 

Thanks for the suggestions Raytheeagle. I will check the cabin air filter

I called the dealer that witnessed the grinding/whining sounds from the compressor and they said they advised a new compressor may be needed, at a cost of $2,700!!