is it time to get rid of the diesel

with the proposed expansion of the london ulez zone next year to anywhere within the m25 motorway itstime i think to get rid of my focus estate titanium x  163bhp.  itsa 62 plate and not ulez compliant. i have used it mainly over the last 4 years backing and forthing to north yorks and back.  its been absutely faultless and achieved 60mpg us mpg almost every trip. but ulez expansion means next yr no one will want to buy it even tho its immac. a worthless piece of tin. its sad.  its a great car.  we buy anycar has offered 3400. should i take it now and be shot of it b4 ulez plans are announced in late july