Is this company legit?

I'm an amateur coin collector. I have a nice sized collection, but all of it has either been bought locally or given to me by friends and relatives from their own collections. I saw an ad on tv today advertising a old coin dealership called "Monaco Financial". I was just wondering if they were legit. My grandad gave me a pretty sizable sum of money for Christmas to put towards my collection, but I don't want to waste my time or money on a company that isn't legit. Anybody know anything about this company, or any others that are or aren't reputable. I'm always kind of wary of coin ads, some of them look kind of shady to me. Thanks!