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That's rather difficult without knowing where you are as that affects both which models are available and which dollars you're talking about.
100hz+ screens tend to be higher end models though, so at best your choice is likely to be limited and there may be none that qualify.
And bear in mind that if you want to feed the TV a 120fps signal (e.g. from a gaming PC) then that will only be possible at Full HD resolutions with the current generation (and only a few of those). HDMI doesn't have enough bandwidth yet, you'd need to wait a year or two for HDMI 2.1 equipped TVs before they can actually show a 4K 120fps source.