Bad concept. Better to find a used streetable vintage honda ct 70, ct 90
xl 100 or some other streetable Japanese small scambler, street or off road, even if you have to do some restoration work.
Since they are not road legal, there are plenty of way cheaper and better
dirt bikes. That frame looks particularly weak and the 4 stroke motor on it is not very powerful.
The people buying those must be rich spendthrifts. There are plenty of way better and cheaper nonroad 2 stroke dirt bikes.
Alternately, anyone can build a 2 stroke or 4 stroke fully suspended mountain bike with high quality 4 stroke or 2 stroke kit, for thousands cheaper. (motorized bicycle).