I assume that you are looking to get into this hobby and want to know what a good 40 size standard trainer would be in your price range?? Please bear in mind that a RTF airplane is not going to fly itself and without an experienced pilot helping you the plane will have a very short life. As to your question, are you referring to the planes that also include the engine and radio set up?? If thats the case the cheapest I have seen is the Hobbico SuperStar Select MKII . The price on these is $280.00 from Tower Hobbies. If you are just looking for a pre built plane, there are more choices in the almost RTF planes called ARF (almost ready to fly). You can get a decent trainer of this type for $70.00. The Tower Hobbies Tower Trainer 40 MKII ARF .40-.46,62" is one example. Then there are the small electric park flyer type planes but these are underpowered, expensive for what you get and fragile. I wouldn't bother with these. [8D]