The Mu is one of the more expensive models. It's the most popular dolphin models used by foldies. The new Trinx is also the similar dolphin model and it has all the necessary components for a foldie. 18 speed Shimano Sora drivetrain, 451 = 22 inch high profile wheelset. If you can accept Trinx, it should be a bargain. Available in Kimbell Jaya within your budget, give and take a hundred or two. Haggle for freebies, they usually oblige. Like water bottle cage, water bottle, rear lights  etc. Anyway, you might as well visit Kimbell Jaya (ask for Jimmy) and see the wide range that he has stock there.