How much is this antique typewriter worth?

I bought an old, black, heavy Remington typewriter at the thrift store for $40. Most if the keys still work, and I can see it being in working condition, just needs work. I'de never use it obviously but I would really like it to be fixed. Where/whom...

i have a royal portable typewriter made in 1926, it is is mint condition with carry case and cleaning brush.. Carry case is worn but typewriter is perfect. Does anyone know how much this could be worth?

I came across an old Adler Satellite typewriter that my grandma owned and was wondering how much I could get for it? How would I go about selling it? I don't know what year it was made in, nor do I have a serial number on it, but my grandma is 97, and...

I own a sx-100 underwood typewriter. It´s in fine conditions, it works perfectly, every key, every function. Maybe a little worn-out letters from the brand name on the top but almost perfect. I want to sell it but I dont know if it´s worth...

the serial number is H307502 thank-you