Perfectly safe. Unlike Big Bad Toy Store, EE don't require a deposit for higher priced items, so you can cancel if you find this somewhere else one day. The only issue is they're often slower to get things in. Slower than Big Bad Toy Store and BBTS can be really slow sometimes. EE often have "Free shipping on orders over X amount" which includes preorders, so you could always order the figure now, then check back later and re-order if the promotion pops up.
*Edit* in fact, they have the free shipping code available right now. FREESHIP59