I have just purchased a cheap detector from ebay and was wondering if this would be as effective as a dearer one at finding cartridges and bulletts and other smaller items ? i presume it would not be!

This is my first MD so i did not want too rush in and spend hundreds on one! i have taken it out once so far and managed to unearth a red bull can and a fosters can lol!any help in this area will be greatly received

all the best jay (a total MD novice)