I've been powder coating as a hobby and as a small part time business for about 20 years. I always tell people that I can give them an approximate number, but until I actually see the part(s), I can't give an exact number. If I get parts that are caked in grease, oil and dirt, I charge an hourly rate for the cleaning. Some parts can be blasted to bare metal in just a few minutes, and some need to have a lot of layers of paint and/or rust blasted off. If a part was powder coated before, that takes a bit longer to blast off than just paint. It always cracks me up when I shoot a person a price I think is reasonable, and they think it is way too high. I am into it on a small level, but I still have a big compressor, a 3'x3'x6' oven, a medium size blasting cabinet, a decent powder coating gun and assorted other equipment. I probably have $15K in powder coating gear in my garage. I bet most professionals have 10-15 times more invested in their equipment. Plus, there are consumables to consider. I use sand blasting media, cleaning solutions/supplies, powder and a lot of assorted supplies. All of those consumables continue to go up in price. I don't have overhead to deal with, but a professional has a big overhead expense. Here's the deal. If you want the parts to look fantastic, then by all means have them powder coated. But it might cost more than you think it will. Shipping is always the killer, so you will want to find someone local if possible. That all being said, I would say expect between $100-$150.