Andy,
Lets review these names. Without a doubt solid keywords. Lets first throw out the .com.tw - this is merely a third level or subdomain, which in all honestly, is almost valueless... The only successful subdomain is .co.uk..
If we review Businesses.vg we must first explore the extension, as everyone must admit the keyword is strong. Looking through comparable sales records (see sig!)... we find that .vg's do not sell well. Infact, I have only 3 listed in our database... the highest price being paid was 1k for sms.vg - considering this, the likelyhood of finding an end-user for this undeveloped domain name is going to be long and hard.. infact, more than likely impossible.
My recommendation as you are new to the boards and it appears domaining, is try to stick with .com - Yes, most solid names are already registered... but if you stay ahead of the crowd, you can find some great deals and even some nice expiring domains for registration fees...
Good luck,
Justin