I bought a Albatros D.Va because I like the Albatros (I've built one already) and I find the wooden fuselage with camp wings particularly interesting, so I wanted to get another while they are still available.
I suspect kits like the AEG and Felixstowe were ordered in fewer numbers by Wingnut Wings because of their higher prices. However, i do not think this will impact their availability in the long run. Quality cost money to design, engineer, produce and ship, so I don't find the prices unusual. For people used to paying small prices for smaller, lesser quality kits, I can understand their disappointment, but i don't agree.