I would NOT buy a cheap tripod and expect it to be good. Instead, buy a cheap tripod and expect it to be barely adequate. In line with that, do not spend $180 or so on some no-name brand tripod; the cheap Dolica's are what $59-$79 will get you. For that price, you're getting a marginal piece of equipment; I think that for $189 and a no-name brand, you;'re getting the same quality of tripod AND a nice reaming from the seller. For the kinds of uses many amateurs use them for, I fully understand the value of the $59-$79 Dolica type pods; basically a camera holder for selfies and group pics.
Don't waste time on the D90. That ship sailed years ago.