If you buy keyword specific domains, you're really buying the type in traffic. I use the URL builder and redirect through that URL so you can see how much traffic your getting from the keyword domain. There seems to be no rythme or reason to what keyword domains deliver traffic and what don't. By tracking traffic with the Google URL builder you get a feel for what names are giving you traffic and which are not. ie. the plural, the singular, two words, three words, the possessive, etc.
The dropdate for the following TLDs is not verified. Domains might drop earlier or later: .eu .cat .aero .travel .tel .jobs .ae .at .be .bg .cr .es .fm .gd .gg .gi .gl .gs .gy .hn .ht .hu .id .im .ir .is .je .ke .kg .ky .kz .la .lu .lv .ma .mu .ng .no .om .pe .pf .pm .qa .re .ro .ru .rw .sb .sm .sn .so .st .su .sx .tc .tf .th .tl .to .ug .uy .uz .wf .yt .berlin
In theory, you could technically acquire a domain for $10,000 and be able to sell it for $100,000. You could also acquire a domain for $10 and be able to sell it for $100,000, $10,000… or $100, you get the picture. Because of this, it’s hard to recommend a perfect starting budget because your strategy, experience, and the pace at which you learn will hugely affect your buying and selling decisions.