The local shop had these little ukuleles for 20? so I bought one. Now I don't know dick about this instrument so help me out. Are the strings supposed to be like this, where the two middle strings are thicker than the other two? That seems a little weird if a lighter string is tuned lower. :S And when I tune this thing up it stays in tune for like 15s and then goes to sh*t.
You bought it for 20 Euros. Did you really expect something amazing?
Check out www.ezfolk.com . They specialize in instruments like the banjo and ukelele. They have forums there that will help you better then these ones.