Hi, I have a 2X Omcon Barlow from Sky Instruments. I paid $39 plus shipping for it about a year ago. As Mars got closer, I decided to replace it with an apochromatic Barlow because I needed to push the image scale to 3X rather than 2X. This is a good mid-level barlow to double your magnification, just not up to being pushed to 3X as I needed to do for Mars.
If you would like it, I'll ship it to you CONUS for $25.
Below is a stock image of the Barlow but mine looks just like it. Thanks in advance for your consideration. Jim Dixon