Well... I have few objections, if you don't mind...
I don't see the purpose of very first page, the one that contains logo and button "Enter Site", nothing else... It just wastes my time and forces me to make a unneccessary click or tap.
If you feel that page is necessary, at least add your slogan or short description or whatever there, so people know which site they are about to enter.
In the home page, animated backgorund looks nice; but white areas make white text invisible at times, so I have to read words one by one, as they get out of white background areas. Since it's tagline of your site, I guess you don't want it unreadeble, no?
Main menu in top right corner should be bigger, it's somewhat bland.
If you aim to be taken seriously, either put real pictures in "Meet the team" section, or remove it altogether; this way it looks childish.
The same applies to contacts in footer - "London", and phone number? Without real street address, it raises suspicion, so again, make it real or remove it. Also, a contact form wouldn't do harm, for those who don't want to bother with e-mails.
I would recommend to move portfolio ("Current domains" section) to the top, and drop "Who we are", "Why us" and "Meet the team" to the bottom. You want visitor to see your portfolio immediatelly, not to bore him with your opinion about who you are and why you are good, not to mention stock images that have nothing to do with domains. Prospective buyer will pay his attention to your domains; if he likes the domains, don't worry about your tagline.
In portfolio, image and arrow at the bottom of the box are clickable; the domain itself is not clickable... and somehow, it is natural place to click, it looks like a link, so it should be a link.
These links open in new tab, which is somewhat inconvenient, at least in my opinion - usually, you open external links in new tabs, not internal links.
And in these pages, you have again the same issue with text readability - parts of the text are difficult to read over background picture. In contact form, there is no field for the offer itself; one expects it should be entered in main inquiry field, but I believe separate field for the offer would do better. Also, you should specify which fields are mandatory and which are optional - in my opinion, only e-mail and offer should be mandatory.
Do a proof reading - I spotted error "assests", and I would also scale down the tone a bit; sentences like "our company is leading the new generation of business' as the prime capital to striving within the online industry" or "when you begin using the right domain name, your company is in a more productive position to succeed" are not only dull marketing stuff difficult to understand, but can also misslead a potential customer - it sounds to me like you can also provide site design, graphic design, hosting, SEO, etc. - everything one needs for "powerful online presence" and "online space for your business", while in reality - as far as I understand - you only buy/sell domains, nothing else, correct?
Sorry if it was too harsh, but you asked for opinions; and then, it's only my opinion, please feel free to disregard it...
Good luck with your venture!
