How much does this cost to the nearest dollar?

Tele Vue 2x Powermate, 2 Image Amplifier
Televue Power Mate 2X Image Amplifier accepts all 2 eyepieces and accessories and comes with additional 1.25 adapater!Incorporates a positive and negative doublet for better optical correction.Higher magnifications are possible with high optical performance compared to doubling up Barlows.Televue Power Mate 2X Image Amplifier delivers high performance for CCD or film!Accepts Televue's T-Ring Adapter for close coupling to cameras and CCD imagers.Ideal for Hydrogen-alpha filter use such as with Daystar models. Vignetting, edge field aberrations and pupil movement - all introduced when using Barlows with long focal length eyepieces, are minimized. Tele

Price is $

Price: $343