What fuel for generators and sale price

I have a Tarpen DC generating set Type 10 B and a Wyse power mini gen generator both have Villiers Norton engines and both have dry fuel tanks. Please can anybody advise me on the type of fuel they should have  and what price I should ask for each when I advertise them.
Thank you.

Without seeing pics and knowing how they run if they charge you can't put a price on them. As they stand maybe £30 but that's as found condition.

Stu.

Hi Stu
Thank you for replying, I have tried up loading photographs of the generators for you to view using host an image and insert an image but been un successful .
H.Y

I had same problem with 'Host an image'.
Try creating yourself an account on Photobucket, load the images there then click the image to get the share links top right. Click the Direct link to copy the url to clipboard then use the Insert an image your post. Hope this helps.

Thank you

Photo bucket is best on this site but you also need to be a member for about a week before you can post to stop spam etc.

Stu.