For those who haven't tried a high value one time offer you should think about this.
I had a low price OTO ($27) after a sale. It was only converting at about 10%.
I decided to add a high value product related to my main product and I priced it at $197.
Well - damn if it hasn't converted at 50% so far. (A small number of customers though).
I could kick myself in the butt for not trying this sooner. This will easilt add at least $2k to my bottom line.
Just thought I'd share that experience. By the way the front end product is $67 - so each sale with the OTO got me $264 - a big increase.