You could probably make more parting it out, but time wise it would be easier to sell it as a whole. If you were closer to me I would be very interested in it as a tow plane for gliders since I am considering building a Senior or larger old timer and powering it with a 4S or large AXI.

Anyways, best of luck.

List it with the local clubs in your area. If they have a webpage/news letter, most are more then willing to put stuff in there. Also, sometimes local hobby shops are willing to display models that are for sale.

Ask around. The senior is a nice plane, there might just be someone looking to pick one up.

The last thing I can suggest is swap meets. Not always the best place, but if you ask a fair price (remember, this is a swap meet) you can make a sale.