1787 6 Pence Now What Else?

Looks good to me. A nice example

Possibly cleaned in the past though as its very pale.

Still I am assuming it was a gVF or low EF condition if America

gVF British grading. 1787 is a very collectable year being the only 6d issued between 1758 and 1816.

Some dates in the 18th century GB silver are much more affordable than others. (Some are downright crazy high prices!)

If you focus on Shillings and Sixpences, the following are the dates you most likely to pick up cheaply:

1787, both shilling and sixpence. Look out for the with and without hearts versions, same prices.
1758, both Shilling and sixpence.
1746 & 1745, both shilling and sixpence. The good value ones have "Lima" below the bust, which is an interesting piece of history
1723 shilling, with "SSC" in the quarters for the South Sea Company, again interesting history.
1711, both shilling and sixpence.
1703, both shilling and sixpence with "Vigo" beneath the bust - again interesting history. (These are a bit more but good.)

These also cover the different monarchs of the 18th century except William III, who is really more 17th century anyway.