First off, most people never understand what the top keywords are or how much they are worth in these lower end extensions. Poker.im for instance is looking at $2k at least within the year of reg, Casino.im about $5k+, Travel arguably also 4-figures, and sex potentially mid to high 4-figures. That said, there's a big difference between those and other top tier keywords. A lot of what many people consider "top keywords" are not even close to top tier keywords (I remember someone mentioning blook as a top keyword...yes, not book but BLOOK, LOL), and most keywords that are not top keywords are not worth getting in these extensions until sales can back the extension's value (as otherwise, the money is better spent on 10+ .com names instead).
That said, and keeping in mind that "reg fees" = high $xx...
onlinecasino.im - Decent, might be helped by recent sale of OnlineCasino.eu for a godly amount (30k+ euros, I forget exactly how many). I'm guessing low $xxx within the year.
onlinepoker.im - .hk sold for low $x,xxx, but Macau helped that sale...this is probably also looking at low $xxx within the year, possibly up to lower mid $xxx. Always has potential for a good sale.
arcade.im - People seem to think this is an elite word in domains...I personally don't. No sales to look at except low ones to resellers. Reg fees - $100 at most IMO.
jokes.im - Ditto. Reg fees.
lawyer.im - Decent one, likely to do low $xxx within the year.
mortgage.im - One of your better ones, lower-mid $xxx to mid $xxx within the year. Loan(s) would be better, but this is still good.
realestate.im - Easily your best IMO. Mid $xxx to around $750 within the year. Your only Top Tier keyword IMO as mortgage isn't as taken as people tend to think whereas realestate is very much taken all around.
wifi.im - Decent, though I think wifi is not as popular a term as it used to be. Low $xxx within the year.
instantmessage.im - IMO, these "clever" ones are very hit/miss and are hard to evaluate. I personally don't think this will sell, but you never know. Ask high and hope.
windows.im - TM...park it and try to sell quietly if you can or M$ will come after you.
Good luck!