brighton minor cup matches 1960s

[holtie96]

hi
found some interesting programmes today
brighton v hastings 24/4/61 sussex professional cup single sheet
brighton v whitehawk brighton charity cup 3/5/61 single sheet
brighton v chelsea reserves 4/3/61
brighton a v arsenal a 11/2/61
brighton v spurs reserves 20/8/60

i paid a fair old whack for them, am i right in saying that they are relatively scarce? Don't recall coming across the brighton cup match before, anybody know much about these?
thanks for your time and advice as always