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 get an apochromatic Barlow and haven't used this since.
If you would like it, I'll ship it to you CONUS for $29.
Below is a stock image of the Barlow but mine looks just like it. Thanks in advance for your consideration. Jim Dixon