Hello, thank you for the question. I have never heard of 1234computer.com, so I checked with some other websites for reviews and scam reports. I looked at several, and none of them say anything useful. 1234computer.com is a very new company, and I didn't find a single review either good or bad.
I'll put the links to the sites I looked at below. Apparently, the site's actual origin isn't obvious either. I see Singapore and I see India too. I recommend that you double check their bona fides, and keep looking for reviews yourself. Also, be careful about giving them unfettered access to your business information, and perhaps have someone else double check their work.
If you know people in the IT business, it wouldn't hurt to check with them just to see if they've heard anything about 1234computer.com themselves, good or bad.
I hope that's been useful to you. Feel free to reply with question or comment, although I don't know that there's anything more I can tell you. If I've answered you I'd appreciate a positive service rating please.