Assuming you'll probably get at least $2.50 per-share in dividends over then next 4 months, and the fact that this has consistently gone over $45 per-share over the last year, it's almost a cinch that you could walk away getting effectively $47.50.
In other words, it's basically a slam dunk 22% gain over the next 6-8 months. If you could consistently get returns like that you'd be a very rich man.
At that rate $20k would be worth almost 1.1 million after 10 years. BKE is a fantastic buy right now.