1970 circa All Pro 16" convertable bike

1970's circa All Pro 16" convertible bike
swapmeet find all original and really good shape down to the solid rubber tires which is rare for a boys bike bought it for $20 bucks
I know that All Pro bikes were a Schwinn Knock off and sold by Kmart in the 70's and 80's and its known as a convertable because of a set screw can remove tank and convert to a girls bike..
just did a good cleaning to tires and took some 000 steel wool to spokes and rims now looks like new..
Any more info,value would be helpful.. enjoy