Depends on the keyword. There are available many .info one word domains what I have check.
They dont usually have much value, but keywords like car, business, insurance etc are worth for buying with cheap price even with .info extension.
Try to look for good hot trend .com domains, future technology .com domains etc. Especially future technology could worth someday good money if you can catch .com extension. They are long time investments, but who will know if you get 10000x profit for nice name. And nowadays, good names are taken, it's year 2017, try to negotiate nice deal with nice names wich could have good end-user pool. Don't waste your money in .info domains because there are still some really nice and old names for sale at this forum with very good reseller price.
But this is only my opinion.
Thanks,
Sami.