Does your tenancy agreement say about keeping a load of stuff in your flat? I;ve rented before and the agreement usually says about behaving in an orderly fashion to other tenants, but not whether I should tidy up or not (as long as it was clean when the landlords visited). I had tenants myself who used my flat as a warehouse for their record business. I am a huge hoarder myself so I know that you feel like, but why keep electronic scrap? If you can't mend it or sell it on eBay for parts, you might as well just bin it.