Welcome to Fantasica and welcome to Fantasica-Unoffical Forums!
Jupi isn't bad, but everyone's getting rid of their Maidens for quick TEs. You could hold onto them for a while and their value will go up when people want/need them (but that's all on chance) OR sell them off now before people decide to not want them anymore. It's a hard choice. I hold onto mine because they're Event based, so this may never come again.
Also, if the 4* you got was Dhimitrios, I'll trade a 4* for it with a skill; see my I.D number, look for me through the "Trade" program, "Search" for me with my ID, then post on my Wall if you do have Dhimitrios. I may not come back to this forum.
(= Again, welcome to Fantasica.