Got one recently because I remember loving how comfortable it was when I had a chance to try it out for a while. Found a white and red one for a bargain bin price along with an included red case. It smelt of cigarettes (which I didn't know when buying it) but I was able to remove the smell from both and its been serving me well.
I just bought one this morning on EBay. It sold for $100 and included Animal Crossing (w/Welcome Amiibo update) and Mario Kart 7. Not a bad bargain when the more desirable New 3DS XL sells for 2x-3x that amount.
Another reason the 2DS is cheaper is because if you open the console, you will see that there is only one large motherboard where everything connects to instead of having lots of smaller daughterboards connecting to the main board so that everything will fit into the hinge design like on the other 3ds models.
Do it for sure, my dad's got a 2ds XL, and it can play nes games as well, which the older versions like my 2ds and 3ds XL cant. Make sure to buy at least a 128gb sd card
there are a number of games that feel better to play on the 2ds. especially pinball games from the og ds. and if you can find one for 50 dollars its a must buy.