Probably because both of those guns are junk, to the point where nobody buys them. The Pico, at one time, had probably the worlds shittiest idea for a mag release on a handgun, unless they
changed it.
Also look at the bore axis on this thing.... f***ing Horrendous....
View attachment 392008
SCHOOL BUS... up top.
https://youtu.be/8TPK83YR-z0?t=298
The Rohrbaugh is at least innovative, but is expensive and its so small that its difficult to keep both hands on the gun while firing. Recoil springs only lasted 200 rounds, too.