I have had a lot (probably too many
) figures printed from stls and if you use a print farm service (best sourced local to you via Etsy) the cost will be based upon:
How much resin is used, ie the bigger the figure the more expensive or whether the figure can be printed hollow (most busts) or only solid.
The quality of the resin used, they are not all equal.
Whether the supplier is full time professional with dozens of machines or an amateur with a printer in his garage.
Whether the final model is "display ready" fully cleaned of printing artefacts or will still need further cleaning and sanding by you.
Find the printers near you and ask them to quote you for the specific model you want. Most will also resize the model for you to suit your specific need or only print parts of a multipart figure, if you do not want a sculpted base or decor scenery for example. This helps keep the cost down a lot.
As a guide I pay between €7 and €11 for a 1/10th or 1/9th scale head & shoulders hollow printed bust in top quality resin and between €10 and €12 for a solid 75mm sized figure. This is from a full time printer in Spain and includes the cost of shipping.