Does this make sense to anyone ? And how could I word it better? (word it better?? is that even proper English)

Níor sé ina adhb, do thairgeas ach tá sé áisiúil.

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Bíonn rudaí maithe mall

this isn't proper Irish, I guess it means "it's not a problem, I offered (??) but it is handy"... But apart from "tá sé áisiúil", the sentence isn't right

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Is fearr Gaeilg na Gaeltaċta ná Gaeilg ar biṫ eile
Agus is í Gaeilg Ġaoṫ Doḃair is binne

was supposed to be.
It isn't a problem. i offered if it was handy.

What would be the correct way to write that?

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Bíonn rudaí maithe mall

"Fadhb ar bith. Do thairgeas _____, má tá sé áisiúil."

It's missing something. What did you offer to do?

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Ag lorg cómhra as Gaeilge? Bígí linn - http://www.foramnagaeilge.com

I'd say "gan fadhb ar bith", normally "ar bith" means "any", not "no".
Fadhb ar bith means "any problem".

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Is fearr Gaeilg na Gaeltaċta ná Gaeilg ar biṫ eile
Agus is í Gaeilg Ġaoṫ Doḃair is binne

"I offered if it was handy" is not correct English - and that makes it harder to work out the meaning in order to translate it.

Does it mean "I offered to give XX, if I could get hold of it"?

In any case "do thairgeas" (past tense) followed by má tá (present tense) is not right either.

In fact, the entire sentence makes no sense. Does it mean "I would have offered it, if I could have got hold of it?" Do thairiceóinn é, dá dtiocfadh sé fém láimh?

Well the correct way to say it in English, would be

I only offered to do it , if it was convenient for you.

I suppose the context is important,
I offered to pick up a parcel.
The person responded it would be more difficult to arrange collection than to deliver ,
My response was (supposed to be )

It isint a problem. I only offered (to collect the parcel ), if it was convenient ( for you)

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Bíonn rudaí maithe mall

Or even "if it were..." :P I would also say (though I think this is more a sense of style as opposed to grammar, though I could be wrong) "if it would be convenient...".

8 years complaining, and people still saying it! http://www.daltai.com/discus/messages/1 ... 1127087942
I'm sure I was taught it was an acceptable, informal way of saying "No problem". Oh, well...

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Ag lorg cómhra as Gaeilge? Bígí linn - http://www.foramnagaeilge.com

and I'm sure I was taught what I said in my message
When you look at other contexts it's clear that "ar bith" means "any":

"thig leat rud ar bith a dhéanamh"
"íosfaidh mé rud ar bith a bhéarfas tú domh"

and

"char úrt sé rud ar bith"... etc etc

it has not negative meaning by itself, it only has when there's a negation before , just like "any" in English

And moreover, as far as Ulster Irish is concerned, the word "fadhb" doesn't even exist , it has come because of school Irish, John Ghráinne says it in his last book if I remember well, and I couldn't find any occurrence of that word in the Ulster literature in Tobar na Gaedhilge. John Ghráinne said what is the "real" Ulster word but I can't remember it right now

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Is fearr Gaeilg na Gaeltaċta ná Gaeilg ar biṫ eile
Agus is í Gaeilg Ġaoṫ Doḃair is binne