Wh smiths have a buy one get one half price on Lego. This now retired set which is hard to find is £19.99 we bought with Lego Yoda's Jedi starfigter 75168 also £19.99 (which is more readily Available at this price) so paid £30 for both sets.
Currant prices for the interceptor are £30.97 @ Amazon and £19.99 @ toys r us only 2 places I can find stock.
Mini figures, obi wan and R4-P17.
As its retired it only increases in value so great to buy and keep for a few years. https://shop.lego.com/en-GB/Obi-Wan-s-Jedi-Interceptor-75135