If you love to tinker... they need you. If not, you don't need them.
Chris, I never heard of a B3-3 so I put B3-3 air rifle into the search line of my web browser. If you do the same you will fine its a newer version of the Chinese B3, and underlever. There are listings for several reviews, many of which are on this forum. Try a search here at the top of the entry page. You'll probably find what you seek.
"Before you buy a B3, you might greatly benefit from speaking with Mike Melnick first."I have to concur. I own a few B-3s, and they are a blast to mod and tune... but, many are not anywhere near ready to shoot as purchased. If you love to tinker... they need you. If not, you don't need them.