That old Optima is absolutely no good to you whatsoever.
The best thing you can do with it is donate,er,send it to me.......
You jammy devil,Mid Optimas were some of the finest race machinery
available BITD,well capable of dicing with the other finest 4WD machinery
of the time,the famous Schumacher CAT series.
I used to race a Mid Custom myself and loved it.
As the Massiv say,strip it,clean it up and give it a good servicing,
(you'll learn all about it that way)slip in some new batteries and
have a blast with it.
Once you've got the hang of it,buy your self some newer machinery.
It's not that the Optima can't be set up to race well,but spares are getting
rarer and more expensive all the time for 'em.
Above all,don't sell it,keep it and give it some stick every now and then,
you have a great piece of RC racing history there.