My trike (the model of which is no longer produced, I gather) would have been about £900 retail, I think. I guess if I wanted to replace the Galaxy with a new bike, that would cost a bit, but I only paid £15 for mine. My Brom is probably my second most valuable machine in monetary terms.
However, define 'best'... Most expensive, or most useful, or most comfortable or most miles covered in happiest trips?