I'll also be a launch provider, here are my rockets:
First of all, the Kergle I, an incredibly cheap solid-fuel based rocket.
Secondly, the Jaythe I, an industrial rocket designed for reliability (Reliability not guaranteed!) and ease-of-use (Ease of use not guaranteed!)
And here are my prototypes:
The Kermus I, a plane-launched space station core. (NOT AN SSTO! IT DETACHES THE WINGS, AND ALONG WITH IT THE JETS!)
Why is the Kermus I a prototype? Because it can't climb effectively and it is prone to destabilizing and crashing into the ocean.
Prototypes are my experimental designs, launch providers can buy them off of me and take them as their own, getting all the profits if they patch up the design.
Prices:
Kergle I: 15000 (Cost to build 12700)
Jaythe I: 40000 (Cost to build 34835)
Prototype costs:
Kermus I: Unit cost 85000 (Cost to build 81500) Buy-off-of-me cost: 100000
Downloads:
https://kerbalx.com/Terra1/Kergle-I
https://kerbalx.com/Terra1/Jaythe-I
https://kerbalx.com/Terra1/Kermus-I