You have done very very well! Edward VII halfcrowns in high grades are worth good money.
Let me get the least valuable out of the way first: the two 1902 coins might just about get £100 each, the 1910 perhaps £250, though more to the right buyer.
All but two of the others - 1906/7/8/9 - would be worth at least £300-£400 each, maybe more if we could see bigger pictures (the difference between EF and Uncirculated is the difference between e.g. £300 and £700).
Now for the best news: the 1904 - if nearer to UNC than EF has got to be worth well over £1000. The 1903 is the rarest (after 1905 which you don't have); it may have been cleaned, but should still be worth between £1500 and £2500, though it would be good to see bigger pictures.
Can you post a larger picture of each coin? You'll need to make several posts to get round the size limit for each separate post.