I would like to know how much the starting prices go for and how much a suit with decent fabric and details would cost.
Made-to-measure is, generally speaking, 15% or 20% more expensive than off-the-rack made by the same manufacturer in the same fabric. It's fairly standard for the 15% or 20% surcharge to be waived during trunk show and the like, although Ralph Lauren has a peculiar way of describing that surcharge. Polo suits would probably start at around $1000 or $1100. Purple Label suits would probably start at around $3000. You could spend significantly more if you insisted on worsted cashmere or somesuch thing. If you're going to spend retail for a suit, buying made-to-measure at a trunk show usually makes a whole lot more sense than buying off-the-rack.