Hey Mike!
I would say this, if you wanted to find cheaper tax preparation you 100% could but it might cost you more in the form of incorrect tax returns or inflated amounts of tax due. I agree with just about everyone above that the price should be either discussed upfront or in the engagement letter before services began.
It's different to know how much they saved you because tax preparation typically isn't a service to save you taxes, you'll want to meet with them during the year for this. However, some elections and decisions can be made during tax preparation that could benefit you but most clients aren't aware of these small changes that saved them money.
I would say focus on the relationship, if it's a good relationship and you trust them then keep working together. If cost is a big factor which I completely understand during these times, then search around but know finding that real estate-friendly accountant that is in the $1,300 (depending on your situation) range and having a good relationship with them might be difficult to find.
Lastly, ask her if additional services come with that price. 99% of the time the answer is no, but some firms offer free mid-year calls or check-ins for being a tax preparation client.
If you're comfortable reaching out to remote firms contact anyone here in the forums. I believe someone above said they aren't that expensive.