As many as possible without putting the whole neighborhood out! Lol I paid £100for mine, but I am be needing a new pair soon, not because there's anything wrong with the ones I have but because I'm a girl and one pair isn't enough! Lol.
Just picked some RST kevlars up. Better, thicker denim than the draggin jeans, and come with C.E armour in the knees (draggin jeans don't, unless you purchase extra). Kevlar on the arse, hips and side of leg, and kevlar stitching throughout. These should do for walking round in Italy. Nice fit too. £70 too, so not that bad.