No problem
You can pick up all the loose ships for £5-£20 depending on condiiton, and the TIE bomber goes from £50-£100 loose.
I've been building up a carded collection, and they've cost me between £25 and £40 pounds each (and some of those were graded).
Palitoy ones cost a bit more, as do ESB cardbacks but there not very popular so they're very cheap
My Takara TIE was only £25
The boxed ones cost a bit more, I've seen a resealed TIE bomber go for £200, and MIB £500ish???, but I bought these three for £120