Both my 06 TSX and 08 RDX P/S pump went out and I did an used low mileage replacements eBay for under $100 each. The TSX on was still working for +4 years until the car was totaled in 2019 by a red light runner. The RDX P/S pump is still going strong after +3 years. Purchased P/S fluid and took both vehicles to a local shop to change out. I think it was under $250-$300 for everything.
get a cheap one off amazon and put it on yourself. Return it if it doesn't work; amazon is good about returns.
If the pump is "bad", you can save it with a $20 gates PS pump rebuild kit that has all the seals. Another $10 for the bearing and you'll be set. I did this on my TL and have the kit waiting for my MDX
I bought one off of Amazon for $75 about 2 months ago. IT's still going strong. I also bought the power steering hose, which I have yet to replace. The hose cost $32 on Amazon. The hardest part about replacing the pump was using the belt tensioner to reinstall the belt. Once I bought the correct tool from Harbor Freight for $13 it was very easy.