Majsta and kipper2k did you investigate options where the boards were partially or completely assembled at a factory? Between the low price and labor, you're losing money and probably sanity. There's no time for life and no enjoyment in what you're doing.
From what I've seen of small run products, it shouldn't cost you too much more and it would free you to do other things, enjoy life, earn a decent profit.
If another unnamed company is able to sell much lower performing boards for much more than you're charging for a much more capable board, you're doing it wrong.
The price that you're charging for the Vampire is ridiculous - ridiculously low. You haven't costed your bill of materials, labor or shipping correctly. The Vampire should cost minimum $300 US and probably more.
People see the performance of the Vampire. They see that it makes an Amiga faster than at any time in its history - by orders of magnitude. With everything that the Vampire provides - stellar performance, lots of very fast memory, fast SD storage, and video performance that every Amigan drools over.
I honestly don't think you would have any problems selling for $300 - $400. Heck, I think you'd sell out several production runs at $500. This would let you have the boards manufactured by a commercial assembler, yield would definitely improve, quality would improve with commercial pick and place and reflow, and factory tested. The only labor you would have is programming and shipping. Charge what it's really worth, what covers the COMPLETE costs plus 50% minimum. Charge more than that, whatever the market will bear! You should be charging more and profiting more than that other company. They've kept the classic machines alive and the community is very grateful to them for it but you are taking the Amiga into the future!
Life would be better for you, customers would be MUCH happier with wait times reduced and quality improvements, and more importantly you'd be able to focus on the more important tasks of development and MAKE MORE MONEY.
Sure,this started as a labor of love but how much love are you feeling right now? This needs to be a business that moves product and makes money! It needs to move on from the hobbyist stage as soon as possible.