Check out the Tower Trainer 40 kit, they are easy to build and fly really nice, I believe that they are around $50. But Everyone will chime in with their opinion and recommend what they, or a friend started with. But I think that the Tower Trainer 40 is one of the chepest kits available. You may also want to look at a 60 size kit, just because that are easier to see in the air.. but the 40 will be fine, it doest fly fast, which is what you want the engine and radio were some of the cheapest Tower Hobbies had too... the engine was gave to me but it is a Thunder Tiger GP42 ($50) and the radio is a Airtronics VG400 ($120)

heres a pic of mine.