We have never needed to replace any major electronic part on any of our presses. I highly recommend Geo Knight, best customer service/support of any company we have ever dealt with. The cost of parts are very reasonable. The price does seam a little high for your replacement part to me, but I am use to geo knight pricing.So I've been a big fan of Stahl's for awhile. Really happy with their heat transfer vinyl and the heat press and hat press I own. Having the tech support available 24/7 is great and the equipment is USA made.
Today I found out that the main circuit board on my Hotronix Auto Open Heat Press (STX20 made in 2014) needs to be replaced. Cost of the board with ground shipping is $233. This is really basic electronics - two timers and a temp control. It beeps and releases an electromagnet when timer #2 ends. Plus it displays the down force of the platen - still not real high tech. Your postal scale uses the same technology.
I feel I'm getting ripped off by the price of replacement parts. My next heat press might be a Geo Knight. Anyone that's used either brand I'd appreciate your input.