What all the people disagreeing with you are ignoring is the work and skill that goes into the product design. It takes a lot of iteration, which means lots of

What all the people disagreeing with you are ignoring is the work and skill that goes into the product design. It takes a lot of iteration, which means lots of prototypes, which means lots of time and money spent just developing the product. This means iteration on the electronics, the UI, the case, etc etc. Anyone could whip together something that's bigger, uglier, and has a worse user interface, all for less money, but to make something equivalent to what TE makes is a what takes all the time/money/effort/skill. Also most of the disagreers are also ignoring the "bring it to market" step. Even if you built something of equivalent product design as TE, building one for yourself is vastly different than doing a product run where you expect each product to be the same. PCB design and manufacturing is relatively easy and inexpensive, but all the plastic/rubber forming/molding is much trickier and significantly expensive. Getting past the manufacturing aspect, there's the whole marketing, sales, and distribution aspect, which aren't anything to be sneezed at either. Seriously a lot of work goes into bringing a product to market that DIYers building single devices or very tiny runs of devices don't even consider. While TE might not be doing Behringer-level runs of products, their runs are definitely bigger than a lone DIYer could ever handle by themselves. (Note: This isn't to say that TE's products are necessarily better for everyone than something they could make themselves (or buy for less from a different company), of course. After all, the world's musicians got by just fine before this mixer was released. I just wanted to chime in and explain some of reasons why TE's stuff costs more than what you might think you could make yourself.)