Buying an AC online??

I think I bought some big items from them. I am not hesitant, but I could just be the lucky one.

I have bought and sold AC units online with no issues.

I bought a Mach 8 refurbished for 600 or 800 on eBay and am very happy, it is still like new 3 years later.

Good chance that an AC unit either works or it is in the trash. I not expert, but this is not an item that you can put sawdust into the transmission and get it to work enough to get out the door. Only exception is if there is a slow coolant leak. The units are not serviceable like a car's so a person who could add coolant back to a leaky unit could also fix it!

The only reason to get matching one is for your own personal preferences.

I bought a few things from them. Shipping was a little slow, but I didn't need it in a hurry anyway.

A lot of the bad reviews have to do with shippers, not the retailer itself. RV Parts Country is a pretty decent retailer.

Check eTrailer I bought a water heater from them and had good service and it was the cheapest I could find.

What does CW have to do with the OPs question?

I recently bought 2 Furrions from CW.com and they sat on my order for 2 weeks before shipping. Each time I called I was told something different. When I placed the order the salesman said everything was in stock. I even had to buy 2 inside grills from PPL and pay for 2 day shipping to complete my install because CW told me those were now on 2-3 week backorder. Surprised when 1 showed up a couple days later. CW needs to get their act together.
A friend who ordered the same a couple days after I ordered received his complete order in about a week.

Check with PPL Motorhome Parts online.

PPL Motorhome parts

They usually have good prices, in-stock, and good support in selecting.