No LLLL.com prices are skyrocketing, i was able to buy one for $15 last december and you can't get a decent one for $50
Someone sent you the offer? If they sent you an e-mail/offer, I wouldn't sell below $150. Of course, I've turned down nice amounts of cash for some of my domains. In the end it's just whatever satisfies you.
I think $89 is a decent offer for this name, if you need the cash now, then sell it. Otherwise, wait for a few months more and it'll definitely be worth low $xxx.