Samsung Galaxy S2 swap for Blackberry 9900 in Billingham, Durham for sale

I am looking to swap my Black Samsung Galaxy S2 for a Blackberry 9900. I have only used the phone for 2 weeks, before being issued a contract phone by my current employer, therefore having no further use for my Galaxy S2. The phone is in immaculate condition and comes complete with all original accessories and box. Used Galaxy S2 phones also have a higher resale value than 9900 phones on sites such as Greatbritainlisted and other independent phone buying websites, so if your preference is to sell phones then this deal could be well worth your while My reason for wanting a swap deal is that my partner really would like a Blackberry 9900, but she still has time left on her current contract and doesn't want to take out a second contract. I am also selling the phone for if I am unable to find anyone willing to go ahead with a swap deal, but my preference is the swap