My friend is very intelligent but her first language is not English.<br/><br/> The grammar in this sentence does not sound correct:<br/><br/>We are interested in purchasing your property at 45 South St., Plymouth, MA. Are you<br/>interested to sell?<br/><br/>My guess would be, that it should read:<br/><br/>We are interested in purchasing your property at xxxx. Are you interested in selling it ?