LDInspector

[Orion Pobursky]

Thanks for this, too.   For Rebrickable I have a best-guess connection throttle algorithm which seems to work most of the time (which results in horrible timing for large part lists).

There are other sites with "part out values" like brickmerge.de - somehow they must obtain part prices... Does anybody know how? Thanks in advance.

They probably have BrickLink API access. Since BrickLink requires you to have a static IP and there's no way we're going to pay for that, BrickLink API access (However useful it may be) isn't going to happen anytime soon here at LDraw.

The other option is to severely throttle your page requests. 2 sec between requests or something ridiculous like that.