Should i sell mini-z or not?

I have some delima, i'm not that rich guy who can get another enthusiastic stuff for hobby nor able to keep it long to maintain it. As you know i have several MINI-Z (miniature size 1:28 scale hobby grade radio control models) which is very fun to drive but very expensive to maintain as the parts very hard to come by and its a rare item to be sell or sold off in our local market. After thinking long term affect i decided to switch my level to a better platform.......i'm going for 1/8 NITRO or Electronic Brushless engine which is easy maintenance cost, more parts availability and fast but require bigger space and huge ebergy consumption. MINI-Z is fun especially being outdoors but it too much addictive! Once you're addicted the parts upgrade was too much of a cost vs the bigger scale models. Should i sell or should not....errmmmmmm...