Suggest globalsign wildcard ssl vendor – ssl2buy?

I am creating sub-domains sd.mydomain.com, bd.mydomain.com and some others. I want to protect all sub-domains over the main domain. My colleague suggests wildcard certificate from globalsign. I am surprised when I compared the price…

https://www.globalsign.com/ssl/wildcard-ssl/

GlobalSign Domain SSL - Wildcard ($849)

GlobalSign Organization SSL - Wildcard ($949)

I found ssl2buy.com that offers globalsign wildcard ssl at a reduced price. I communicated with the salesperson for any price gimmick or cause of cut price. I got a quick response from the support team and they clear that ssl2buy is authorized reseller and they have reduced their profit margin, there is no price gimmick.

https://www.ssl2buy.com/globalsign-wildcard-ssl-domain-validation.php ($400)

https://www.ssl2buy.com/globalsign-wildcard-ssl-organization-validation.php ($600)

Does anyone have experience with them? Can you suggest other globalsign resellers that offer cheapest price wildcard ssl?