Whats a good USB modem to get for the Pc-DC method?

[Scrungo]

im using the PC-DC method (and please dont tell me "hah, just get DreamPi, its SOOOO much better!" i know that, but i dont have the money right now, so im just starting off with the cheap option until i CAN get DreamPi)
i was wondering whats a good USB modem in the $20 or less range? i found this one: https://www.amazon.com/External-Compatible-Windows-Support-Auto-Dial/dp/B008RZTJC0/ref=pd_lpo_sbs_147_t_1?_encoding=UTF8&psc=1&refRID=GS61BCR26YFHPVMFZQ2W&dpID=41Sn3jsumtL&preST=_SY300_QL70_&dpSrc=detail
but i wanna make sure it'll work before i buy, cause the other super cheap modem i bought didnt work, so i wanna be extra careful, so im asking here first

[SEGA RPG FAN]

If you plan to get a dreampi in the future, you may as well get a modem that's compatible with that.